Malicious PDF — malware analysis report

Static analysis result for SHA-256 0097ab2cb7ce6d74…

MALICIOUS

PDF

71.6 KB Created: 2021-02-21 17:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 33bc8059d4c543c081a86af886a0aec9 SHA-1: eb4fe644b06792edc9100695e649c99490ef8cd8 SHA-256: 0097ab2cb7ce6d746eba4e0ae11c4c50fb6e6058d9fb01ae47215078dca7c817
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure malicious links within a large number of seemingly unrelated URLs. While no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest the document is designed to redirect users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/aws?utm_term=how+to+draw+a+forest+tree+step+by+step PDF link annotation
    • https://cdn.sqhk.co/mujawiru/gyggT4Z/76118353226.pdfIn PDF document text
    • http://bobr.space/33350732350ilczw.pdfIn PDF document text
    • http://fasad-dom.site/giorno_giovanna_theme_sheet_music_violaf02cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374860/normal_60030768387f0.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/jfEiijg/zavoguxig.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/jRDjetW/magic_tap_tiles_piano_edm_music_games_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/rumomezojeku/0TJqjgb/anime_glitter_color_by_number.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/fnYihax/31251918547.pdfIn PDF document text
    • https://cdn.sqhk.co/fowujizul/gcKhije/54914919256.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/Olij7XH/minecraft_new_update_2020_ps4.pdfIn PDF document text
    • http://servempieza.site/snes_emulator_macspzve.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/Yifjdzk/79877308733.pdfIn PDF document text
    • http://kexipisibufexur.22web.org/wugukamateguvobi.pdfIn PDF document text
    • http://fomilexavekol.22web.org/email_writing_format_samples.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/rhcjgjd/35867907951.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/bagadisotopokabumafemuda2la3l.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetijesi/d9HjbRu/derailed_taphouse_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temikukem.epizy.com/get_your_guide_bali_reviews.pdfIn PDF document text
    • http://komiguzuvare.rf.gd/executive_summary_format_for_business_plan.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC80 5296 bytes
SHA-256: 3acdd77c2390dcb4c0051f45f4dc4d45d934ad1a6a213ae4e3c76b3211b18b0e
font_01_sfnt_off0000eea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 10148 bytes
SHA-256: a71bb1436e3342812d3e6ac515b7986b6e7ee4a1ed1f158c808749c6b462828a

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